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No. 624,982. PatBIItBII' May; us, was.

X LA MOTTE SAGE & F. T. MclNTYBE.

PORTABLE BUBGLAR ALARM.

(Application filed Mar. 26, 1898.)

(No Model.)

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ll'NTTED STATES PATENT OFFICE.

X LA MOTTE SAGE AND FREDERICK T. MOINT YRE, OF NEW YORK, Y.

PORTABLE BU RG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 624,982, dat ed May 16, 1899.

Application fil ed March 25,1898.

To (Z5 whom it may concern:

Be it known that we, X LA MOTTE SAGE and FREDERICK T. MOINTYRE, citizens of the United States, residing at New York, in the State of New York, have invented a new and useful Portable Burglar-Alarm, of which the following is a specification.

Our invention relates to burglar-alarms, and more especially to devices of this class of a construction and size-to permit of their being carried in the pocket, the object of our invention being to construct a portable burglar-alarm which may be quickly attached to a door-casing,window-frame, transom-casin g, or any like fixed support by the side of an opening door or window in such manner and position that the opening of the door or window will actuate the alarm to explode an ordinary paper cap.

With this object in view our invention consists in the improved construction, arrangement, and combination of parts hereinafter fully described and afterward specifically pointed out in the appended claim.

In order to enable others skilled in the art to which our invention most nearlyappertains to make and use the same, we will now proceed to describe its construction and operation, reference being had to the accompanying drawings, forming part of this specification, in which Figure l is a perspective view illustrating a burglar-alarm constructed in accordance with our invention. Fig. 2 is a cen tral vertical section through the same.

Like letters of reference mark the same parts Wherever they occur in the drawings.

Referring to the drawings by letter, A indicates a hollow casing or frame open at the bottom and both ends and provided at the end of one of its sides with projecting lugs B. One

end of the casing is provided with a'longitu dinal slot 0, extending to about the middle of the top of the casing, as shown at C. The

top also has a hole or perforation D and three triangularly-arranged points E.

F indicates a bent arm or hammer provided with bifurcated arms G, pivoted at their inner ends to the lugs B. p

H indicates a spiral spring secured at its outer end to the hammer F and passing.

Serial No. 675,174. (No model.)

through the slot 0 and secured at its inner end to a pin I, projectinginwardly from the casing A.

' J indicates the central bull) or button of explosive matter, inclosed in paper J and known as a paper cap for toy pistols. This cap is placed in position. by impaling the paper J upon the pins E. A small notch K is out in the bottom of one of the arms G. A curved trigger R is pivotally secured within the casin g and projects some distance beyond its opposite end. A curved lever M, of similar shape to the trigger, is also pivoted within the metal casing and has its inner end under the inner end of the trigger and its outer end passing through the slot 0 and engaged in the notch K.

The relative positions of the hammer F and spring H are such that when the hammer is drawn into the position shown in Fig. 2 the directline of pull of the spring upon the hammer is a straight line between the point of connection of the spring to the hammer and to the pin I, and such line falls beyond the pivotal point of the hammer in the lugs B. As a consequence the hammer will be held in that'position as longas desired, the end of designed to project beyond the edge of thed'oor-casing in the path of the moving door.

The advantages attending the use of our invention are numerous, the alarm being extremely light, portable, and cheap. It can be readily attached and detached at points where the slightest attempt to remove any door, window-sash, shutter, transom, or the like will be immediately followed by an explosion sufficiently loud to waken a sleeper or call the attention of a person in a distant part of the house. The expense of the particular ammunition which we use is nominal, such explosives being in common use and very cheap.

While we have illustrated and described the best means now known to us for carrying out our invention, wedo not wish to be understood as restricting ourselves to the exact details of construction shown, but hold that any slight changes or variations such as might suggest themselves to the ordinary mechanic would properly fall Within the limit and scope of our invention.

It is obviousthat instead of having ears or lugs turned up from the case and a spring arranged upon the top of case, We may cut away one end of the case and have the hamrner pivoted in such cut-away end and the spring arranged Within the case Without departing frornthe principle of our invention.

- Having thus fully described our invention, what We claim as new, and desire to secure by Letters Patent of the United States, is

In a burglar-alarm, the combination of the metal casing, open at the end and provided with projecting lugs and a longitudinal slot a hammer having bifurcated arms pivotally secured to the lugs, aspring passing through the elongated slot and secured at its ends to the hammer and easing respectively, a lever pivotally attached Within the casing, having one end projecting through the longitudinal slot and bearing under the hammer, and a trigger pivotally mounted in the casing, having its inner end in engagement with the inner end of the lever and its outer end projecting beyond the casing, substantially as described.

X LA MoTTE SAGE. F. 'r. MOINTYRE.

Witnesses:

B. YEOKER, J NO. N. HETRIOI'L 

